.flip-card{width:min(576px,calc(100vw - 2rem));aspect-ratio:3 / 2;perspective:1200px;cursor:pointer;outline:none;position:relative}.flip-card-inner{position:absolute;top:0;right:0;bottom:0;left:0;transform-style:preserve-3d;transition:transform .6s ease}.flip-card-inner.is-flipped{transform:rotateY(180deg)}.card-face{position:absolute;top:0;right:0;bottom:0;left:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:4px;overflow:hidden}.card-face--back{transform:rotateY(180deg)}.card-front{display:flex;flex-direction:column;justify-content:space-between;padding:clamp(14px,4.2vw,24px) clamp(16px,4.9vw,28px);height:100%;color:var(--white);box-sizing:border-box}.card-front__title{font-family:var(--font-condensed);font-weight:800;font-size:clamp(28px,9vw,54px);line-height:.9;text-transform:uppercase;color:var(--white);margin:0;flex-shrink:0}.card-front__body{display:flex;flex-direction:column;justify-content:flex-end;gap:10px}.card-front__tip{font-family:var(--font-body);font-weight:400;font-size:clamp(11px,2.8vw,16px);line-height:1.45;color:var(--white)}.card-front__provocation{font-family:var(--font-body);font-weight:400;font-style:italic;font-size:clamp(10px,2.4vw,15px);line-height:1.4;color:var(--white-70);padding-left:clamp(6px,1.5vw,10px);border-left:2px solid var(--white-30);margin:0}.card-back{display:grid;grid-template-columns:1fr 1fr;background:var(--off-white);height:100%;position:relative}.card-back__divider{position:absolute;left:50%;top:8%;bottom:8%;width:.5pt;background:var(--gray-ddd);transform:translate(-50%)}.card-back__col{padding:clamp(12px,3.5vw,20px) clamp(12px,3.8vw,22px);display:flex;flex-direction:column}.card-back__col--left{justify-content:flex-start;gap:10px}.card-back__col--right{justify-content:flex-start;gap:12px}.card-back__eyebrow{font-family:var(--font-body);font-weight:600;font-size:clamp(7px,1.9vw,11px);text-transform:uppercase;letter-spacing:.15em}.card-back__counter{font-family:var(--font-body);font-weight:400;font-style:italic;font-size:clamp(10px,3vw,17px);line-height:1.5;color:var(--gray-333);flex:1 1 auto;padding-top:clamp(4px,1.4vw,8px);overflow:hidden}.card-back__wordmark{font-family:var(--font-condensed);font-weight:800;font-size:15pt;text-transform:uppercase;letter-spacing:.04em;margin-top:auto}.stamp-box{width:clamp(65px,19vw,110px);height:clamp(65px,19vw,110px);flex-shrink:0;align-self:flex-end;object-fit:contain;display:block;opacity:.85}.card-back__info-address{font-family:var(--font-body);font-weight:400;font-size:clamp(8px,2.1vw,12px);line-height:1.7;color:var(--gray-666);font-style:normal;margin-top:auto}.card-back__recipient-address{font-family:var(--font-body);font-weight:400;font-size:clamp(9px,2.4vw,14px);line-height:1.6;color:var(--gray-333);font-style:normal;margin-top:auto}.card-back__actions{display:flex;align-items:center;justify-content:flex-end;gap:4px;align-self:flex-end;margin-top:4px}.card-back__action-btn{background:none;border:none;padding:4px;cursor:pointer;display:flex;align-items:center;justify-content:center;opacity:.7;transition:opacity .15s;text-decoration:none;color:inherit}.card-back__action-btn:hover,.card-back__action-btn--copied{opacity:1}.card-back__share-label{font-family:var(--font-body);font-size:clamp(7px,1.8vw,10px);font-weight:600;letter-spacing:.05em}.archive-page{padding:2rem;max-width:1400px;margin:0 auto}.archive-empty{text-align:center;padding:4rem;color:var(--gray-666);font-style:italic}.archive-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(576px,100%),1fr));gap:2rem;justify-items:center}.card-detail-page{display:flex;align-items:center;justify-content:center;min-height:calc(100vh - 64px);padding:2rem;background:#f0eeea}@media (max-width: 640px){.card-detail-page{padding:1.5rem 1rem 1rem;align-items:flex-start}}@media (max-width: 480px){.archive-page{padding:1rem}}.pdf-page .card-front{padding:18pt 21pt;height:100%;box-sizing:border-box}.pdf-page .card-front__title{font-size:40pt}.pdf-page .card-front__tip{font-size:12pt;line-height:1.45}.pdf-page .card-front__provocation{font-size:11pt;padding-left:7pt}.pdf-page .card-back{height:100%;box-sizing:border-box}.pdf-page .card-back__col{padding:15pt 16pt}.pdf-page .card-back__eyebrow{font-size:8pt}.pdf-page .card-back__counter{font-size:13pt;padding-top:6pt}.pdf-page .card-back__info-address{font-size:9pt}.pdf-page .card-back__recipient-address{font-size:11pt;line-height:1.6}.pdf-page .stamp-box{width:70pt;height:70pt}@media print{.flip-card{width:6in;height:4in;aspect-ratio:auto;perspective:none;cursor:default}.flip-card-inner{transform:none!important;transition:none}.card-face--back{transform:none;page-break-before:always}.card-front{padding:18pt 21pt}.card-front__title{font-size:40pt}.card-front__tip{font-size:12pt;line-height:1.45}.card-front__provocation{font-size:11pt;padding-left:7pt}.card-back__col{padding:15pt 16pt}.card-back__eyebrow{font-size:8pt}.card-back__counter{font-size:13pt;padding-top:6pt}.card-back__info-address{font-size:9pt}.card-back__recipient-address{font-size:11pt;line-height:1.6}.stamp-box{width:70pt;height:70pt}}